diff -ruN libmseed/selection.c libmseed_mod/selection.c
--- libmseed/selection.c	2019-06-19 10:59:29.000000000 +0200
+++ libmseed_mod/selection.c	2022-03-15 08:54:29.178367090 +0100
@@ -703,6 +703,7 @@
     case '\\':
       if (*pattern)
         c = *pattern++;
+      /* FALLTHRU */
     default:
       if (c != *string)
         return GLOBMATCH_FALSE;
